DNA and Chromosomes
20 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the function of DNA in cells?

DNA stores and transmits genetic information, managing the requirements and activities of the cell.

What are the two types of cells that have evolved over time?

Prokaryotic cells and eukaryotic cells.

Where is the DNA located in prokaryotic cells?

The DNA is located in the liquid part of the cytoplasm, known as the nucleoid region.

What are plasmids in prokaryotic cells?

<p>Plasmids are small amounts of circular, double-stranded DNA that are separate from the cell’s chromosomal DNA.</p> Signup and view all the answers

What are the two types of eukaryotic membrane-bound organelles that contain DNA?

<p>mitochondria and chloroplasts</p> Signup and view all the answers

Where is most of the DNA in a eukaryotic cell found?

<p>in the nucleus</p> Signup and view all the answers

What are the ends of chromosomes called?

<p>telomeres</p> Signup and view all the answers

What is the decondensed form of chromosomes called?

<p>chromatin</p> Signup and view all the answers

How much DNA does each human somatic (body) cell contain when completely decondensed to linear form?

<p>about 2 to 3 metres</p> Signup and view all the answers

What is the purpose of condensing chromatin into chromosomes prior to cell division?

<p>to protect the genetic code and ensure identical copies are transferred to both daughter cells</p> Signup and view all the answers

What is the term used to describe the process of copying DNA?

<p>DNA replication</p> Signup and view all the answers

Where does DNA replication take place in eukaryotic cells?

<p>Nucleus</p> Signup and view all the answers

What is the term used to describe the feature of DNA replication where each double-strand of DNA consists of one old strand and one newly synthesized strand?

<p>Semi-conservative</p> Signup and view all the answers

In which direction are DNA nucleotides added by DNA polymerase to the exposed bases of the existing 'old' strands?

<p>5' to 3'</p> Signup and view all the answers

What is the role of helicase in DNA replication?

<p>To break the hydrogen bonds between the complementary bases and unwind the DNA strands</p> Signup and view all the answers

Why is the direction of DNA synthesis from 5' to 3' important?

<p>Because DNA polymerases can only add nucleotides to the 3' end of the DNA strands</p> Signup and view all the answers

What is the significance of telomeres in DNA replication?

<p>They limit the number of DNA replications by shortening after each replication</p> Signup and view all the answers

In which direction is the new DNA synthesized during replication?

<p>5' to 3'</p> Signup and view all the answers

What type of cells undergo DNA replication prior to cell division?

<p>Both prokaryotic and eukaryotic cells</p> Signup and view all the answers

What happens to the amount of DNA in a cell during replication?

<p>The amount of DNA doubles</p> Signup and view all the answers

More Like This

Cell Nucleus and Chromosomes Quiz
18 questions
5-L1+
30 questions

5-L1+

PowerfulCerberus avatar
PowerfulCerberus
Chromosomes and DNA Structure
14 questions
Use Quizgecko on...
Browser
Browser